Simultaneous Excitation and Emission Enhancement of Fluorescence Assisted by Double Plasmon Modes of Gold Nanorods
Simultaneous Excitation and Emission Enhancement of Fluorescence Assisted by Double Plasmon Modes of Gold Nanorods
复制标题
金纳米棒双等离子体激元模式辅助荧光的同时激发和发射增强
DOI：
10.1021/jp4001626
复制
发表时间：
2013-05-23
影响因子：
3.7
通讯作者：
Li, Zhi-Yuan
中科院分区：
文献类型：
--
作者：
Liu, Si-Yun;Huang, Lu;Li, Zhi-Yuan
本文提出了一种利用金纳米棒（GNR）的双等离子体模式来有效增强周围发射体荧光的方案。同时利用GNR的横向和纵向表面等离子体共振（TSPR和LSPR）模式分别提高激发和发射效率。为了证明这一想法，使用了涂有Oxazine-725染料分子掺杂二氧化硅壳的gnr。为了比较，我们还研究了具有相同壳层的金纳米球，其中单等离激元共振模式只与Oxazine-725的激发波长匹配。实验结果与离散偶极子近似方法的理论模拟结果一致，成功地证明了双spr辅助下的荧光有效激发和发射增强。
Here we propose a scheme utilizing the double plasmon modes of gold nanorod (GNR) to efficiently enhance the fluorescence of surrounding emitters. The transversal and longitudinal surface plasmon resonance (TSPR and LSPR, respectively) modes of GNR are simultaneously utilized to enhance the excitation and emission efficiency, respectively. To demonstrate the idea, GNRs coated with an Oxazine-725 dye molecule-doped silica shell are employed. For comparison, gold nanospheres with the same shell are also studied, of which the single plasmon resonance mode matches only with the excitation wavelength of Oxazine-725. The experimental results, in agreement with theoretical simulations using the discrete dipole approximation method, successfully demonstrate the efficient excitation and emission enhancement of fluorescence assisted by the double SPRs of GNRs.